REVIEW OF THE WRIST Bones ActionsMovements and Muscles

REVIEW OF THE WRIST Bones, Actions/Movements, and Muscles

Extensor Indicis n n Dorsal Origin: n n Insertion: n n Distal, posterior ulna middle and distal phalanxes of the second phalange Actions: n n Extension of the 2 nd finger Weak wrist extension

2 Lunate 1 Trapezium 4 2 nd Metacarpal 3 Trapezoid 5 Proximal Phalanx of the 4 th Phalange

Flexor Digitorum Superficialis n n Palmar Origin: medial condyle of the humerus n n ulnar head - medial coronoid area radial head - radial tuberosity area Insertion: split tendons attach to the sides of the middle phalanx of the four fingers (palmar surface) Actions: n flexion of elbow, wrist and fingers

What muscle inserts on palmar surface at the base of the 5 th metacarpal and the pisiform? n Flexor carpi ulnaris

Name the action at the wrist Flexion Ulnar flexion or adduction

Palmaris n n Palmar Origin: Medial epicondyle Insertion: Palmar aponeurosis Action: flexion of the wrist

What nerve passes through the carpal tunnel? n Median nerve

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Styloid process Scaphoid Lunate Triquetrum Pisiform Trapezium Trapezoid Capitate Hamate Metacarpals Proximal phalange Middle phalange Distal phalange

Extensor Carpi Ulnaris n n Dorsal origin: lateral condyle of the humerus insertion: base of the 5 th metacarpal action: n n extension of the elbow and wrist; adduction of the wrist

Phalanges ? Middle phalanax of the 2 nd finger ? Proximal phalanx of the thumb or 1 st finger ? Distal planax of the 4 th finger

Extensor Pollicus Brevis

Abductor pollicus longus

Extensor carpi radialis brevis

Extensor Carpi Radialis Longus n n Dorsal origin: lateral condyle of the humerus insertion: base of the 2 nd metacarpal (dorsal side) action: n n extension of elbow and wrist; abduction

Name the bone Radius Wrist Elbow Ulna Name the bone

Extensor Digitorum n n Dorsal origin: lateral condyle of the humerus insertion: middle and distal phalanges of the four fingers (dorsal side) action: extension of the elbow, wrist and fingers

Name the action at the fingers Flexion Adbuction

What muscle inserts on the dorsal surface at the base of the 5 th metacarpal? n Extensor carpi ulnaris EXTENSOR because it is on the dorsal surface. CARPI because it inserts on a metacarpal (or carpal) bone ULNAR because it inserts to the medial side (5 th metacarpal) of the wrist.

Flexor Carpi Ulnaris n Palmar n Origin: medial condyle of the humerus Insertion: pisiform, base of the 5 th metacarpal Action: n n n flexion of the elbow flexion of the wrist adduction of the wrist ?

Action at her wrists? Flexion Action at his wrists? Adduction

1. Flexor retinaculum 2. Median Nerve 3. Ulnar Nerve 1. Structure? 3. Nerve ? 2. Nerve ?

Flexor Carpi Radialis n n Palmar Origin: medial condyle of the humerus Insertion: base of the 2 nd and 3 rd metacapals (palmar surface) Action: n n n flexion of the elbow flexion of the wrist abduction of the wrist ?

Name the bone Radius Elbow Wrist Name the bone Ulna

Extensor Pollicis Longus n n n Dorsal origin: upper posterior surface of the ulna insertion: base of the last phalanx of the thumb (dorsal side) action: extension of the wrist and thumb palpation: most prominent on the dorsal side of the hand

Metacarpals 1 through 5 ? 2 nd metacarpal

Extensor Digiti Minimi n n Dorsal Origin: n n Insertion: n n Lateral epicondyle of the humerus Base of the middle and distal phalanxes of the 5 th phalange Actions: n n Extension of the 5 th finger Weak wrist extension

? Distal Phalanx of Thumb ? 4 th Metacarpal ? Hamate

What group of muscle originate from the lateral epicondyle? n Extensor muscles.

Flexor Digitorum Profundus n n Palmar Origin: n n Insertion: n n Upper, medial surface of the ulna split tendons attach to distal phalanx of the four fingers Actions: n flexion fingers and wrist

Artery ? Radial Artery ? Ulnar Nerve ? Ulnar

Flexor Pollicus Longus n n Palmar Origin: n n Insertion: n n middle anterior surface of the radius base of the distal phalanx of the thumb (palmar surface) Actions: n flexion of wrist and thumb

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Scaphoid Lunate Triquetrum Pisiform Trapezium Trapezoid Capitate Hamate Metacarpals Proximal phalange Middle phalange Distal phalange

While doing push-ups, the wrist is typically in what position? n Extension

Flexor carpi radialis Flexor carpi ulnaris

Extensor carpi ulnaris Extensor digitorum Extensor carpi radialis longus and brevis